<?php
/**
 * Created by PhpStorm.
 * User: longyuanmoqi
 * Date: 2016/11/6
 * Time: 21:41
 */
header('content-type:text/html;charset=utf-8');
echo '<h2>接收到新用户注册！</h2>';
echo '<p>用户名:'.$_POST['username'].'</p>';
echo '<p>密码:'.$_POST['password'].'</p>';
echo '<p>邮箱:'.$_POST['email'].'</p>';
echo '<p>IP地址:'.$_SERVER['REMOTE_ADDR'].'</p>';
echo '<p>浏览器环境:'.$_SERVER['HTTP_USER_AGENT'].'</p>';
echo '<p>请求来源:'.$_SERVER['HTTP_REFERER'].'</p>';
$username=$_POST['username'];
$password=$_POST['password'];
$email=$_POST['email'];
$link=mysqli_connect('localhost','root','');
if(!$link){
    die('连接数据库失败！'.mysqli_error($link));
}

mysqli_query($link,'set names utf8');
mysqli_query($link,'use`itcast`');

$username=mysqli_real_escape_string($link,$username);
$email=mysqli_real_escape_string($link,$email);
$sql="select`id` from `user` where `username`='$username'";
$rst=mysqli_query($link,$sql);
if(mysqli_fetch_assoc($rst)){
    die('用户名已经存在，请换个用户名。');
}
$password=md5($password);
$sql="insert into`user`(`username`,`password`,`email`)values ('$username','$password','$email')";
$rst=mysqli_query($link,$sql);